I made this ten years ago when I broke my ankle. Used it months later to ride the clutch unloading silage onto a pile- ankle was healed for normal use, but needed help on that job. Made three of them for 30, 40, 50 series JD tractors, cost about $5 each. Designed to not interfere with able-bodied person"s tractor operation. Key design point is steel at bottom puts load on top of original pedal- mounting bolts merely hold it in place. Does not interfere with steering wheel or obstruct cab entrance. It"s in AgrAbility files- check their site for other clutch ideas.